1
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Onthath H, Sliem MH, Geetha M, Kumar Sadasivuni K, Abdullah AM, Kumar B. Template free synthesis of CuO nanocomposite for catalytic hydrogenation of CO 2. J Environ Manage 2023; 344:118592. [PMID: 37451105 DOI: 10.1016/j.jenvman.2023.118592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 06/14/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023]
Abstract
Increasing CO2 emissions from industry has disastrous consequences for the environment. Effective utilization of CO2 as a carbon source can address the environmental challenges, and we can address the energy crisis caused by fossil fuel consumption. Electrochemical conversion of CO2 is a promising method recently gaining widespread popularity. Its high productivity, however, remains a major challenge. This work involved a facile novel preparation of a suitable CuO nanocomposite to reduce CO2 into useful fuels effectively. Hydrothermal synthesis was used to synthesize the nanocomposite. The synthesized NC's structure, morphology, and elemental analysis were evaluated using XRD, Raman spectroscopy, SEM, and TEM. ICP-OES analysis was performed to quantify Cu concentration in the CuO composite, confirming 98.6% of Cu of the prepared matrix. The cyclic voltammetry method has been used to study the electrochemical activity of NC for CO2 reduction. Additionally, the NMR & GC-MS analyses were performed to identify the product. Regarding CO2 reduction, the NC performed greatly better than the ordinary CuO. In addition, the NC exhibits high structural stability and durability, demonstrating its potential to reduce CO2 into fuels.
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Affiliation(s)
- Haseena Onthath
- Center for Advanced Materials, Qatar University, PO Box 2713, Doha, Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University, PO Box 2713, Doha, Qatar
| | - Mithra Geetha
- Center for Advanced Materials, Qatar University, PO Box 2713, Doha, Qatar
| | | | | | - Bijandra Kumar
- Department of Technology, Elizabeth City State University, Elizabeth City, USA
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2
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Jlassi K, Al Ejji M, Ahmed AK, Mutahir H, Sliem MH, Abdullah AM, Chehimi MM, Krupa I. A carbon dot-based clay nanocomposite for efficient heavy metal removal. Nanoscale Adv 2023; 5:4224-4232. [PMID: 37560431 PMCID: PMC10408590 DOI: 10.1039/d3na00334e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 06/16/2023] [Indexed: 08/11/2023]
Abstract
Carbon dots and their derivatives with fascinating photoluminescence properties have recently attracted tremendous scientific attention. This work describes the preparation of novel fluorescent bentonite clay (B), modified with carbon dot nanomaterials (CDs), and its usage as a lead removal platform. The CDs were prepared using a hydrothermal method from graphitic waste which served as the carbon source material. The as-obtained CDs were found to be fluorescent, being spherical in shape, positively charged, and smaller than 5 nm. Encouraged by their structure and photoluminescence features, they were used as surface modifiers to make fluorescent bentonite nanocomposites. Bentonite was used as a negatively charged model of aluminosilicate and reacted with the positively charged CDs. XRD, FTIR, XPS, and fluorescence analysis were used to characterize the prepared materials. The results indicate that the CDs intercalated inside the bentonite matrix were stable with excellent optical properties over time. They were finally used as an efficient hybrid platform for lead removal with a removal efficiency of 95% under light conditions, at room temperature, in an alkaline medium, and after only 10 min of reaction, compared to 70% under dark conditions. The pseudo-second-order kinetics and Langmuir isotherm models were better fitted to describe the adsorption process. The maximum adsorption capacity was equal to 400 mg g-1 toward Pb(ii) removal, at room temperature and pH = 8, under light conditions. To summarize, we have designed UV light stimuli responsive carbon dot-intercalated clay with high Pb(ii) adsorption capacity and long-term stability.
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Affiliation(s)
- Khouloud Jlassi
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
| | - Maryam Al Ejji
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
| | | | - Hafsa Mutahir
- Department of Chemical Engineering, College of Engineering, Qatar University Doha 2713 Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
| | | | - Mohamed M Chehimi
- Université de Paris, ITODYS, UMR CNRS 7086 15 rue JA de Baïf 75013 Paris France
| | - Igor Krupa
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
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Nabhan F, Fayyad EM, Sliem MH, Shurrab FM, Eid K, Nasrallah G, Abdullah AM. ZnO-Doped gC 3N 4 Nanocapsules for Enhancing the Performance of Electroless NiP Coating-Mechanical, Corrosion Protection, and Antibacterial Properties. ACS Omega 2023; 8:22361-22381. [PMID: 37396246 PMCID: PMC10308405 DOI: 10.1021/acsomega.2c07288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 02/06/2023] [Indexed: 07/04/2023]
Abstract
A carbon nitride (C3N4) nanomaterial has superior mechanical, thermal, and tribological properties, which make them attractive for various applications, including corrosion-resistant coatings. In this research, newly synthesized C3N4 nanocapsules with different concentrations (0.5, 1.0, and 2.0 wt %) of ZnO as a dopant were incorporated into the NiP coating using an electroless deposition technique. The nanocomposite coatings either ZnO-doped (NiP-C3N4/ZnO) or undoped (NiP-C3N4) were heat-treated at 400 °C for 1 h. The as-plated and heat-treated (HT) nanocomposite coatings were characterized by their morphology, phases, roughness, wettability, hardness, corrosion protection, and antibacterial properties. The results indicated that the microhardness of as-plated and heat-treated nanocomposite coatings was significantly improved after the incorporation of 0.5 wt % ZnO-doped C3N4 nanocapsules. The outcomes of electrochemical studies revealed that the corrosion resistance of the HT coatings is higher than the corresponding as-plated ones. The highest corrosion resistance is achieved on the heat-treated NiP-C3N4/1.0 wt % ZnO coatings. Although the presence of ZnO in the C3N4 nanocapsules increased its surface area and porosity, the C3N4/ZnO nanocapsules prevented localized corrosion by filling the microdefects and pores of the NiP matrix. Furthermore, the colony-counting method used to evaluate the antibacterial behavior of the different coatings demonstrated superior antibacterial properties, namely, after heat treatment. Therefore, the novel perspective C3N4/ZnO nanocapsules can be utilized as a reinforcement nanomaterial in improving the mechanical and anticorrosion performance of NiP coatings in chloride media, together with providing superior antibacterial properties.
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Affiliation(s)
- Fatma Nabhan
- Center
for Advanced Materials, Qatar University, Doha, Qatar 2713
| | - Eman M. Fayyad
- Center
for Advanced Materials, Qatar University, Doha, Qatar 2713
| | - Mostafa H. Sliem
- Center
for Advanced Materials, Qatar University, Doha, Qatar 2713
| | | | - Kamel Eid
- Gas
Processing Center, Qatar University, Doha, Qatar 2713
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Eid K, Sliem MH, Al-Ejji M, Abdullah AM, Harfouche M, Varma RS. Hierarchical Porous Carbon Nitride-Crumpled Nanosheet-Embedded Copper Single Atoms: An Efficient Catalyst for Carbon Monoxide Oxidation. ACS Appl Mater Interfaces 2022; 14:40749-40760. [PMID: 36037411 DOI: 10.1021/acsami.2c06782] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Rational design of metal single-site embedded porous graphitic carbon nitride (P-g-C3N4) nanostructures exploiting maximum atom utilization is warranted to enhance the thermal CO oxidation (COOx) reaction. Herein, a facile, green, one-pot, and template-free approach is developed to fabricate the hierarchical porous P-g-C3N4-crumpled ultrathin nanosheets atomically doped with copper single atoms (Cu-P-g-C3N4). Mechanistically, the quick protonation of melamine and pyridine under acidic conditions induces deamination to form melem, which is polycondensed under heating. The interconnected pores, high surface area (240 m2g-1), and maximized exposed isolated Cu atomic active sites (1.8 wt %) coordinated with nitrogen atom P-g-C3N4 are the salient features of Cu- P-g-C3N4 that endowed complete conversion to CO2 at 184 °C. In contrast, P-g-C3N4 only converted 3.8% of CO even at 350 °C, implying the electronic effect of Cu single atoms. The abundant Cu-nitrogen moieties can drastically weaken the binding affinity of the CO-oxidation (COOx) intermediates and products, thus accelerating the reaction kinetics at a low temperature. This study may promote the fabrication of P-g-C3N4 doped with various single atoms for the oxidation of CO.
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Affiliation(s)
- Kamel Eid
- Gas Processing Center, College of Engineering, Qatar University, Doha 2713, Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University, Doha 2713, Qatar
| | - Maryam Al-Ejji
- Center for Advanced Materials, Qatar University, Doha 2713, Qatar
| | | | - Messaoud Harfouche
- SESAME Synchrotron, King Hussein Bin Talal St / Box 7, Allan 19252, Jordan
| | - Rajender S Varma
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacky University, Slechtitelu 27, Olomouc 783 71, Czech Republic
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Sliem MH, Kannan K, Maurya MR, Jlassi K, Sadasivuni KK, Kumar B, Abdullah AM. Rational Synthesis of Mixed Metal Oxide Clusters Supported on a Partially Etched MAX Phase for Efficient Electrocatalytic CO2 Conversion. Top Catal 2022. [DOI: 10.1007/s11244-021-01528-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Fayyaz O, Bahgat Radwan A, Sliem MH, Abdullah AM, Hasan A, Shakoor RA. Investigating the Properties of Electrodeposited of Ni-P-ZrC Nanocomposite Coatings. ACS Omega 2021; 6:33310-33324. [PMID: 34926883 PMCID: PMC8674913 DOI: 10.1021/acsomega.1c03117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 08/12/2021] [Indexed: 06/14/2023]
Abstract
Superior corrosion resistance along with higher mechanical performance is becoming a primary requirement to decrease operational costs in the industries. Nickel-based phosphorus coatings have been reported to show better corrosion resistance properties but suffer from a lack of mechanical strength. Zirconium carbide nanoparticles (ZCNPs) are known for promising hardness and unreactive behavior among variously reported reinforcements. The present study focuses on the synthesis and characterization of novel Ni-P-ZrC nanocomposite coatings developed through the electrodeposition technique. Successful coelectrodeposition of ZCNPs without any observable defects was carried out utilizing a modified Watts bath and optimized conditions. For a clear comparison, structural, surface, mechanical, and electrochemical behaviors of Ni-P and Ni-P-ZrC nanocomposite coatings containing 0.75 g/L ZCNPs were thoroughly investigated. The addition of ZCNPs has a considerable impact on the properties of Ni-P coatings. Enhancement in the mechanical properties (microhardness, nanoindentation, wear, and erosion) is observed due to reinforcement of ZCNPs in the Ni-P matrix, which can be attributed to mainly the dispersion hardening effect. Furthermore, corrosion protection efficiency (PE%) of the Ni-P matrix was enhanced by the incorporation of ZCNPs from 71 to 85.4%. The Ni-P-ZrC nanocomposite coatings provide an exciting option for their utilization in the automotive, electronics, aerospace, oil, and gas industry.
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Affiliation(s)
- Osama Fayyaz
- Center
for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
- Department
of Mechanical and Industrial Engineering, College of Engineering, Qatar University, 2713 Doha, Qatar
| | - A. Bahgat Radwan
- Center
for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
| | - Mostafa H. Sliem
- Center
for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
| | | | - Anwarul Hasan
- Department
of Mechanical and Industrial Engineering, College of Engineering, Qatar University, 2713 Doha, Qatar
| | - R. A. Shakoor
- Center
for Advanced Materials (CAM), Qatar University, 2713 Doha, Qatar
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Eid K, Sliem MH, Abdullah AM. Tailoring the defects of sub-100 nm multipodal titanium nitride/oxynitride nanotubes for efficient water splitting performance. Nanoscale Adv 2021; 3:5016-5026. [PMID: 36132349 PMCID: PMC9419868 DOI: 10.1039/d1na00274k] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/09/2021] [Indexed: 05/31/2023]
Abstract
Deciphering the photocatalytic-defect relationship of photoanodes can pave the way towards the rational design for high-performance solar energy conversion. Herein, we rationally designed uniform and aligned ultrathin sub-100 nm multipodal titanium nitride/oxynitride nanotubes (TiON x NTs) (x = 2, 4, and 6 h) via the anodic oxidation of Ti-foil in a formamide-based electrolyte followed by annealing under ammonia gas for different durations. XPS, XPS imaging, Auger electron spectra, and positron annihilation spectroscopy disclosed that the high nitridation rate induced the generation of a mixture of Ti-nitride and oxynitride with various vacancy-type defects, including monovacancies, vacancy clusters, and a few voids inside TiO x NTs. These defects decreased the bandgap energy to 2.4 eV, increased visible-light response, and enhanced the incident photon-to-current collection efficiency (IPCE) and the photocurrent density of TiON x NTs by nearly 8 times compared with TiO2NTs, besides a quick carrier diffusion at the nanotube/electrolyte interface. The water-splitting performance of sub-100 nm TiON6NT multipodal nanotubes was superior to the long compacted TiON x NTs with different lengths and TiO2 nanoparticles. Thus, the optimization of the nitridation rate tailors the defect concentration, thereby achieving the highest solar conversion efficiency.
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Affiliation(s)
- Kamel Eid
- Gas Processing Center, College of Engineering, Qatar University P. O. Box 2713 Doha Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University P. O. Box 2713 Doha Qatar
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Mohamed SF, Shehab WS, Abdullah AM, Sliem MH, El-Shwiniy WH. Spectral, thermal, antimicrobial studies for silver(I) complexes of pyrazolone derivatives. BMC Chem 2020; 14:69. [PMID: 33292420 PMCID: PMC7719257 DOI: 10.1186/s13065-020-00723-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/27/2020] [Indexed: 12/17/2022] Open
Abstract
Background Synthesize new complexes of Ag(I) to enhance efficacy or stability and also, pharmacological activities on the operation of pyrazolone's biological properties. Results Efficient and high yielding pathways starting from the versatile and readily available 3-methyl-1-phenyl-5-pyrazolone by Knoevenagel condensation of a sequence of 4-arylidene-3-methyl-1-phenyl-5-pyrazolone derivatives (2a-c) have been formed by the reaction of various substituted aromatic aldehydes Used as ligands to synthesize Ag(I) chelates. Synthesized compounds and their complexes have been characterized by elemental analysis, magnetic and spectroscopic methods (IR, 13C, 1HNMR, mass) and thermal analysis. The spectrophotometric determinations suggest distorted octaedral geometry for all complexes. Both ligands and their metal complexes have also been tested for their antibacterial and antifungal efficacy. Conclusions Newly synthesized compounds have shown potent antimicrobial activity. The results showed that the complex 's high activity was higher than its free ligands, and that Ag(I)-L3 had the highest activity.
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Affiliation(s)
- Soha F Mohamed
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
| | - Wesam S Shehab
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
| | - Aboubakr M Abdullah
- Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar.
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Walaa H El-Shwiniy
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt. .,Department of Chemistry, College of Science, University of Bisha, Bisha, 61922, Saudi Arabia.
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Sliem MH, El Basiony NM, Zaki EG, Sharaf MA, Abdullah AM. Corrosion Inhibition of Mild Steel in Sulfuric Acid by a Newly Synthesized Schiff Base: An Electrochemical, DFT, and Monte Carlo Simulation Study. ELECTROANAL 2020. [DOI: 10.1002/elan.202060461] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mostafa H. Sliem
- Center for Advanced Materials Qatar University Doha P.O. Box 2713 Qatar
| | - N. M. El Basiony
- Egyptian Petroleum Research Institute Nasr City 11727 Cairo Egypt
| | - E. G. Zaki
- Egyptian Petroleum Research Institute Nasr City 11727 Cairo Egypt
| | - Mohammed A. Sharaf
- Department of Maritime Transportation Management Engineering İstanbul University-Cerrahpaşa Avcilar Istanbul 34320 Turkey
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Al-Jamal O, Al-Jighefee H, Younes N, Abdin R, Al-Asmakh MA, Radwan AB, Sliem MH, Majdalawieh AF, Pintus G, Yassine HM, Abdullah AM, Da'as SI, Nasrallah GK. Organ-specific toxicity evaluation of stearamidopropyl dimethylamine (SAPDMA) surfactant using zebrafish embryos. Sci Total Environ 2020; 741:140450. [PMID: 32886985 DOI: 10.1016/j.scitotenv.2020.140450] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/20/2020] [Accepted: 06/21/2020] [Indexed: 06/11/2023]
Abstract
Surfactants are widely used in the industry of detergents, household products, and cosmetics. SAPDMA is a cationic surfactant that is used mostly in cosmetics, conditioning agents and has recently gained attention as a corrosion inhibitor in the sea pipelines industry. In this regard, literature concerning the ecotoxicological classification of SAPDMA on aquatic animals is lacking. This study aims to evaluate the potential ecotoxicity of SAPDMA using the aquatic zebrafish embryo model. The potential toxic effects of SAPDMA were assessed by different assays. This includes (i) mortality/survival assay to assess the median lethal concentration (LC50); (ii) teratogenicity assay to assess the no observed effect concentration (NOEC); (iii) organ-specific toxicity assays including cardiotoxicity, neurotoxicity (using locomotion assay), hematopoietic toxicity (hemoglobin synthesis using o-dianisidine staining), hepatotoxicity (liver steatosis and yolk retention using Oil Red O (ORO) stain); (iv) cellular cytotoxicity (mitochondrial membrane potential) by measuring the accumulation of JC-1 dye into mitochondria. Exposure of embryos to SAPDMA caused mortality in a dose-dependent manner with a calculated LC50 of 2.3 mg/L. Thus, based on the LC50 value and according to the Fish and Wildlife Service (FWS) Acute Toxicity Rating Scale, SAPDMA is classified as "moderately toxic". The No Observed Effect Concentration (NOEC) concerning a set of parameters including scoliosis, changes in body length, yolk, and eye sizes was 0.1 mg/L. At the same NOEC concentration (0.1 mg/L), no organ-specific toxicity was detected in fish treated with SAPDMA, except hepatomegaly with no associated liver dysfunctions. However, higher SAPDMA concentrations (0.8 mg/L) have dramatic effects on zebrafish organ development (eye, heart, and liver development). Our data recommend a re-evaluation of the SAPDMA employment in the industry setting and its strictly monitoring by environmental and public health agencies.
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Affiliation(s)
- Ola Al-Jamal
- Biomedical Research Center, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Hadeel Al-Jighefee
- Biomedical Research Center, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar; Department of Biomedical Science, College of Health Sciences, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Nadin Younes
- Biomedical Research Center, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Roba Abdin
- Department of Biomedical Science, College of Health Sciences, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Maha A Al-Asmakh
- Biomedical Research Center, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar; Department of Biomedical Science, College of Health Sciences, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar
| | - A Bahgat Radwan
- Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Amin F Majdalawieh
- Department of Biology, Chemistry, and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Gianfranco Pintus
- Department of Medical Laboratory Sciences, University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates
| | - Hadi M Yassine
- Biomedical Research Center, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar; Department of Biomedical Science, College of Health Sciences, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Aboubakr M Abdullah
- Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar; Department of Chemical Engineering, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Sahar I Da'as
- Department of Human Genetics, Sidra Medicine, P.O. Box 26999, Doha, Qatar
| | - Gheyath K Nasrallah
- Biomedical Research Center, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar; Department of Biomedical Science, College of Health Sciences, Member of QU Health, Qatar University, P.O. Box 2713, Doha, Qatar.
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Sliem MH, Radwan AB, Mohamed FS, Alnuaimi NA, Abdullah AM. An efficient green ionic liquid for the corrosion inhibition of reinforcement steel in neutral and alkaline highly saline simulated concrete pore solutions. Sci Rep 2020; 10:14565. [PMID: 32884011 PMCID: PMC7471328 DOI: 10.1038/s41598-020-71222-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 07/28/2020] [Indexed: 11/09/2022] Open
Abstract
The effect of the green ionic liquid compound, Quaternium-32 (Q-32), on the corrosion inhibition performance of reinforcement steel, in a simulated concrete pore solution, was investigated at different temperatures and pH values, using electrochemical impedance spectroscopy (EIS). The inhibition efficiency was improved as the concentration of Q-32 and pH values were increased. However, it decreased as the temperature was raised. A Q-32 concentration of 20 µmol L-1 exhibited a 94% inhibition efficiency at 20 °C. The adsorption isotherm was evaluated using EIS measurements, and it was found to obey the Langmuir isotherm. The surface topography was examined using an atomic force microscope and scanning electron microscope. The effect of the Q-32 concentration with the highest corrosion efficiency on the mechanical properties of the mortars was also explained by flexure and compression techniques.
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Affiliation(s)
- Mostafa H Sliem
- Center for Advanced Materials, Qatar University, 2713, Doha, Qatar
| | | | - Farida S Mohamed
- Center for Advanced Materials, Qatar University, 2713, Doha, Qatar
| | - Nasser A Alnuaimi
- Center for Advanced Materials, Qatar University, 2713, Doha, Qatar.,Department of Civil Engineering, College of Engineering, Qatar University, 2713, Doha, Qatar
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12
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Shahzad K, Sliem MH, Shakoor RA, Radwan AB, Kahraman R, Umer MA, Manzoor U, Abdullah AM. Electrochemical and thermodynamic study on the corrosion performance of API X120 steel in 3.5% NaCl solution. Sci Rep 2020; 10:4314. [PMID: 32152388 PMCID: PMC7063046 DOI: 10.1038/s41598-020-61139-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 02/12/2020] [Indexed: 11/08/2022] Open
Abstract
The present work studied the effect of temperature on the corrosion behavior of API X120 steel in a saline solution saturated with CO2 in absence and presence of polyethyleneimine (PEI) as an environmentally safe green inhibitor. The effect of PEI on the corrosion behavior of API X120 steel was investigated using destructive and non-destructive electrochemical techniques. The overall results revealed that PEI significantly decreases the corrosion rate of API X120 steel with inhibition efficiency of 94% at a concentration of 100 μmol L-1. The adsorption isotherm, activation energy and the thermodynamic parameters were deduced from the electrochemical results. It is revealed that the adsorption of PEI on API X120 steel surface follows Langmuir adsorption isotherm adopting a Physi-chemisorption mechanism. Finally, the samples were characterized using scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques to elucidate the effect of aggressiveness of corrosive media on the surface morphology and the corrosion performance of API X120 steel. The surface topography result indicates that the API X120 steel interface in PEI presence is smoother than CO2 with Cl- ions or Cl- ions only. This is attributed to the compact protective film limits the aggressive ions transfer towards the metallic surface and reduces the corrosion rate. Moreover, PEI inhibition mechanism is based on its CO2 capturing ability and the PEI adsorption on the steel surface beside the siderite layer which give the PEI molecules the ability to reduce the scale formation and increase the corrosion protection due to capturing the CO2 from the brine solution.
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Affiliation(s)
- Khuram Shahzad
- Department of Materials Engineering, School of Chemical and Materials Engineering, National University of Science and Technology (NUST), Islamabad, Pakistan
| | - Mostafa H Sliem
- Center for Advanced Materials (CAM), Qatar University, 2713, Doha, Qatar
| | - R A Shakoor
- Center for Advanced Materials (CAM), Qatar University, 2713, Doha, Qatar.
| | - A Bahgat Radwan
- Center for Advanced Materials (CAM), Qatar University, 2713, Doha, Qatar
| | - Ramazan Kahraman
- Department of Chemical Engineering, College of Engineering, Qatar University, 2713, Doha, Qatar
| | - Malik Adeel Umer
- Department of Materials Engineering, School of Chemical and Materials Engineering, National University of Science and Technology (NUST), Islamabad, Pakistan.
| | - Umair Manzoor
- Department of Materials Engineering, School of Chemical and Materials Engineering, National University of Science and Technology (NUST), Islamabad, Pakistan
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Eid K, Sliem MH, Eldesoky AS, Abdullah AM. Data on structural and composition-related merits of gC 3N 4 nanofibres doped and undoped with Au/Pd at the atomic level for efficient catalytic CO oxidation. Data Brief 2019; 27:104734. [PMID: 31737770 PMCID: PMC6849110 DOI: 10.1016/j.dib.2019.104734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 11/16/2022] Open
Abstract
Precise design of graphitic carbon nitride (gC3N4) nanostructures is of grand importance in different catalytic applications. This article emphasizes additional data on the fabrication of metal-free gC3N4 nanofibres (gC3N4NFs) and its associated structural and composition analysis compared with Au/Pd co-doped gC3N4 nanofibres (Au/Pd/gC3N4NFs). The data is including the typical fabrication process of metal-free gC3N4 nanofibers and its SEM, TEM, and element mapping analysis beside Raman, and FTIR spectra relative to Au/Pd/gC3N4NFs. We also investigated the catalytic CO oxidation durability testes on Au/Pd/gC3N4NFs compared to Pd/gC3N4NFs and Au/gC3N4NFs. The presented data are associated with the research article entitled “Rational synthesis of one-dimensional carbon nitride-based nanofibers atomically doped with Au/Pd for efficient carbon monoxide oxidation.” [1].
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Affiliation(s)
- Kamel Eid
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar
| | - Amal S Eldesoky
- Department of Biomedical Engineering, Higher Technological Institute, 10th of Ramadan, 228, Egypt
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Jlassi K, Sliem MH, Eid K, Krupa I, Chehimi MM, Abdullah AM. Novel Enzyme-Free Multifunctional Bentonite/Polypyrrole/Silver Nanocomposite Sensor for Hydrogen Peroxide Detection over a Wide pH Range. Sensors (Basel) 2019; 19:s19204442. [PMID: 31615006 PMCID: PMC6832523 DOI: 10.3390/s19204442] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 09/23/2019] [Accepted: 09/25/2019] [Indexed: 12/16/2022]
Abstract
Precise designs of low-cost and efficient catalysts for the detection of hydrogen peroxide (H2O2) over wide ranges of pH are important in various environmental applications. Herein, a versatile and ecofriendly approach is presented for the rational design of ternary bentonite-silylpropyl-polypyrrole/silver nanoarchitectures (denoted as BP-PS-PPy/Ag) via the in-situ photo polymerization of pyrrole with salinized bentonite (BP-PS) in the presence of silver nitrate. The Pyrrolyl-functionalized silane (PS) is used as a coupling agent for tailoring the formation of highly exfoliated BP-PS-PPy sheet-like nanostructures ornamented with monodispersed Ag nanoparticles (NPs). Taking advantage of the combination between the unique physicochemical properties of BP-PS-PPy and the outstanding catalytic merits of Ag nanoparticles (NPs), the as-synthesized BP-PS-PPy/Ag shows a superior electrocatalytic reduction and high-detection activity towards H2O2 under different pH conditions (from 3 to 10). Intriguingly, the UV-light irradiation significantly enhances the electroreduction activity of H2O2 substantially, compared with the dark conditions, due to the high photoelectric response properties of Ag NPs. Moreover, BP-PS-PPy/Ag achived a quick current response with a detection limit at 1 μM within only 1 s. Our present approach is green, facile, scalable and renewable.
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Affiliation(s)
- Khouloud Jlassi
- Center for Advanced Materials, Qatar University, Doha 2713, Qatar.
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University, Doha 2713, Qatar.
| | - Kamel Eid
- Center for Advanced Materials, Qatar University, Doha 2713, Qatar.
| | - Igor Krupa
- Center for Advanced Materials, Qatar University, Doha 2713, Qatar.
| | - Mohamed M Chehimi
- University Paris Est, CNRS, UMR7182, ICMPE, UPEC, F-94320 Thais, France.
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Eid K, Sliem MH, Abdullah AM. Unraveling template-free fabrication of carbon nitride nanorods codoped with Pt and Pd for efficient electrochemical and photoelectrochemical carbon monoxide oxidation at room temperature. Nanoscale 2019; 11:11755-11764. [PMID: 31183488 DOI: 10.1039/c9nr02571e] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The tailored synthesis of carbon nitrides (CNs) is of particular interest in multidisciplinary catalytic applications. However, their fabrication in the form of one-dimensional (1D) nanorods for electrocatalytic carbon monoxide (CO) oxidation is not hitherto reported. Herein, a facile roadmap is presented for the rational design of Pt- and Pd-codoped CN (PtPd/CNs) nanorods via protonation of melamine in an ethylene glycol solution containing Pt and Pd precursors using NaNO3 and HCl and subsequent annealing. The protonation induces the polymerization of melamine to melon nanosheets that consequently roll up to CN nanorods. This tailored the prompt high mass production of uniform 1D CN nanorods (94 ± 2 nm) with a high surface area (155.2 m2 g-1) and they were atomically codoped with Pt and Pd (1.5 wt%) without a template and/or multiple complicated steps. The electrocatalytic CO oxidation activity of PtPd/CNs is 2.01 and 23.41 times greater than that of the commercial Pt/C catalyst and metal-free CNs, respectively, at room temperature. Meanwhile, the UV-vis light irradiation enhanced the CO oxidation activity of PtPd/CNs nanorods by 1.48 fold compared to that in the dark, emanated from the coupling between the drastic inbuilt catalytic merits of PtPd and the inimitable physicochemical properties of CNs. The presented study may pave the way for using CN-based materials in gas conversion reactions.
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Affiliation(s)
- Kamel Eid
- Center for advanced materials, Qatar University, Doha 2713, Qatar.
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El-Haddad MAM, Bahgat Radwan A, Sliem MH, Hassan WMI, Abdullah AM. Highly efficient eco-friendly corrosion inhibitor for mild steel in 5 M HCl at elevated temperatures: experimental & molecular dynamics study. Sci Rep 2019; 9:3695. [PMID: 30842495 PMCID: PMC6403259 DOI: 10.1038/s41598-019-40149-w] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 02/06/2019] [Indexed: 11/29/2022] Open
Abstract
Laurhydrazide N′-propan-3-one was used as an eco-friendly inhibitor for the corrosion of mild steel in 5 M HCl at elevated temperatures. Various electrochemical techniques and surface characterization methods were utilized in this study. In addition, the kinetics and thermodynamic parameters were calculated and discussed. Furthermore, a geometry optimization of LHP was performed and the time-dependent density functional theory was utilized to calculate the electronic absorption spectra. Finally, frequency calculations were, also, performed on the optimized geometry.
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Affiliation(s)
- Muhsen A M El-Haddad
- Materials Science & Technology Program, College of Arts and Sciences, Qatar University, Doha, P.O. Box 2713, Qatar
| | - A Bahgat Radwan
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar
| | - Walid M I Hassan
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt.,Chemistry Department, Faculty of Science, King Abdulaziz University, B.O. 80203, Jeddah, 21589, Saudi Arabia
| | - Aboubakr M Abdullah
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar.
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Eid K, Sliem MH, Al-Kandari H, Sharaf MA, Abdullah AM. Rational Synthesis of Porous Graphitic-like Carbon Nitride Nanotubes Codoped with Au and Pd as an Efficient Catalyst for Carbon Monoxide Oxidation. Langmuir 2019; 35:3421-3431. [PMID: 30715897 DOI: 10.1021/acs.langmuir.8b03588] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The precise fabrication of efficient catalysts for CO oxidation is of particular interest in a wide range of industrial and environmental applications. Herein, a scalable method is presented for the controlled synthesis of graphitic-like porous carbon nitride nanotubes (gC3N4NTs) codoped with Au and Pd (Au/Pd/gC3N4NTs) as efficient catalysts for carbon monoxide (CO) conversion. This includes the activation of melamine with nitric acid in the presence of ethylene glycol and metal precursors followed by consecutive polymerization and carbonization. This drives the formation of porous one-dimensional gC3N4NT with an outstanding surface area of (320.6 m2 g-1) and an atomic-level distribution of Au and Pd. Intriguingly, the CO conversion efficiency of Au/Pd/gC3N4NTs was substantially greater than that for gC3N4NTs. The approach thus presented may provide new avenues for the utilization of gC3N4 doped with multiple metal-based catalysts for CO conversion reactions which had been rarely reported before.
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Affiliation(s)
- Kamel Eid
- Center for Advanced Materials , Qatar University , Doha 2713 , Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials , Qatar University , Doha 2713 , Qatar
| | - Halema Al-Kandari
- Department of Health Environment , College of Health Sciences, Public Authority for Applied Education and Training , P.O. Box 1428, Faiha 72853 , Kuwait
| | - Mohammed A Sharaf
- Department of Maritime Transportation Management Engineering , İstanbul University-Cerrahpaşa , Avcilar, Istanbul 34320 , Turkey
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Sliem MH, Afifi M, Bahgat Radwan A, Fayyad EM, Shibl MF, Heakal FET, Abdullah AM. AEO7 Surfactant as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in HCl solution. Sci Rep 2019; 9:2319. [PMID: 30783184 PMCID: PMC6381149 DOI: 10.1038/s41598-018-37254-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 11/29/2018] [Indexed: 11/09/2022] Open
Abstract
The impact of AEO7 surfactant on the corrosion inhibition of carbon steel (C-steel) in 0.5 M HCl solution at temperatures between 20 °C and 50 °C was elucidated using weight loss and different electrochemical techniques. The kinetics and thermodynamic parameters of the corrosion and inhibition processes were reported. The corrosion inhibition efficiency (IE%) improved as the concentration of AEO7 increased. In addition, a synergistic effect was observed when a concentration of 1 × 10−3 mol L−1 or higher of potassium iodide (KI) was added to 40 µmol L−1 of the AEO7 inhibitor where the corrosion IE% increased from 87.4% to 99.2%. Also, it was found that the adsorption of AEO7 surfactant on C-steel surface followed the Freundlich isotherm. Furthermore, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements indicated that AEO7 was physically adsorbed on the steel surface. The surface topography was examined using an optical profilometer, an atomic force microscope (AFM), and a scanning electron-microscope (SEM) coupled with an energy dispersion X-ray (EDX) unit. Quantum chemical calculations based on the density functional theory were performed to understand the relationship between the corrosion IE% and the molecular structure of the AEO7 molecule.
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Affiliation(s)
- Mostafa H Sliem
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar
| | - Mohammed Afifi
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - A Bahgat Radwan
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar
| | - Eman M Fayyad
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar.,Physical Chemistry Department, National Research Centre, Dokki, Cairo, Egypt
| | - Mohamed F Shibl
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt. .,Chemistry Department, College of Arts and Sciences, Qatar University, Doha, P.O. Box 2713, Qatar.
| | | | - Aboubakr M Abdullah
- Center for Advanced Materials, Qatar University, Doha, P.O. Box 2713, Qatar.
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Ahmad YH, Mohamed AT, Sliem MH, Abdullah A, Al-Qaradawi SY. Enhanced photocatalytic performance of WON@porous TiO2 nanofibers towards sunlight-assisted degradation of organic contaminants. RSC Adv 2018; 8:32747-32755. [PMID: 35547673 PMCID: PMC9086300 DOI: 10.1039/c8ra06477f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 09/17/2018] [Indexed: 11/21/2022] Open
Abstract
In the last few decades, TiO2 has been widely used in different types of photocatalytic applications. However, the relatively large optical band gap (∼3.2 eV), low charge carrier mobility and consequently its low quantum efficiency limit its photocatalytic activity. Herein, we construct a novel nanostructured heterojunction of WON/TiO2 nanofibers (NFs) by integration of TiO2 nanofibers synthesized by electrospinning of a polymer solution containing a titanium(iv) butoxide precursor with WON nanoparticles fabricated via annealing of a WO3 precursor in dry ammonia at 700 °C. The synthesized photocatalysts were characterized using different spectroscopic techniques. Their photocatalytic performance towards the degradation of methyl orange, methylene blue, and phenol as model contaminants was investigated and the charge transfer process was elucidated and compared to that of a TiO2/WO3 heterojunction. Coupling of WON with TiO2 nanofibers creates a novel heterojunction with enhanced photocatalytic activity.![]()
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Affiliation(s)
- Yahia H. Ahmad
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
| | - Assem T. Mohamed
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
| | | | | | - Siham Y. Al-Qaradawi
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
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Bahgat Radwan A, Sliem MH, Okonkwo PC, Shibl MF, Abdullah AM. Corrosion inhibition of API X120 steel in a highly aggressive medium using stearamidopropyl dimethylamine. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.03.116] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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